tofsee | 1dd18b571a7f0c1aa7dab349223d00dfe5d77a1ade424294e146e27f0711f9c4

General

Target

f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe
Size

13.5MB
MD5

f556b46080b93cac81ba2773afed7bc2
SHA1

8be59c47609a82572e2e4763d29d9385819116df
SHA256

1dd18b571a7f0c1aa7dab349223d00dfe5d77a1ade424294e146e27f0711f9c4
SHA512

0923bba76971117e1ca4cc8dee3269fc9673162486af8fc18a997db5cbbfdf5730f5c6375edc9134d4e7d9ab4a182c74eed47d29ef09fda53dfc010fa855c638
SSDEEP

12288:QIIW7A7qL8SHSIiwN/iZBqAsArTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTD:RA7qLNNf

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

1432 netsh.exe

pid	process
1432	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\yljktmln\ImagePath = "C:\\Windows\\SysWOW64\\yljktmln\\rvcgilbn.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

388 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

rvcgilbn.exe

pid process

4956 rvcgilbn.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

rvcgilbn.exe

description pid process target process

PID 4956 set thread context of 388 4956 rvcgilbn.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2520 sc.exe
2768 sc.exe
3152 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

3488 3068 WerFault.exe f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe
1660 4956 WerFault.exe rvcgilbn.exe

pid	process
388	svchost.exe

pid	process
4956	rvcgilbn.exe

description	pid	process	target process
PID 4956 set thread context of 388	4956	rvcgilbn.exe	svchost.exe

pid	process
2520	sc.exe
2768	sc.exe
3152	sc.exe

pid	pid_target	process	target process
3488	3068	WerFault.exe	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe
1660	4956	WerFault.exe	rvcgilbn.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exervcgilbn.exe

description	pid	process	target process
PID 3068 wrote to memory of 2960	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	cmd.exe
PID 3068 wrote to memory of 2960	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	cmd.exe
PID 3068 wrote to memory of 2960	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	cmd.exe
PID 3068 wrote to memory of 3616	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	cmd.exe
PID 3068 wrote to memory of 3616	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	cmd.exe
PID 3068 wrote to memory of 3616	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	cmd.exe
PID 3068 wrote to memory of 2520	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 2520	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 2520	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 2768	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 2768	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 2768	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 3152	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 3152	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 3152	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	sc.exe
PID 3068 wrote to memory of 1432	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	netsh.exe
PID 3068 wrote to memory of 1432	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	netsh.exe
PID 3068 wrote to memory of 1432	3068	f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe	netsh.exe
PID 4956 wrote to memory of 388	4956	rvcgilbn.exe	svchost.exe
PID 4956 wrote to memory of 388	4956	rvcgilbn.exe	svchost.exe
PID 4956 wrote to memory of 388	4956	rvcgilbn.exe	svchost.exe
PID 4956 wrote to memory of 388	4956	rvcgilbn.exe	svchost.exe
PID 4956 wrote to memory of 388	4956	rvcgilbn.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3068

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yljktmln\
2⤵
PID:2960

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rvcgilbn.exe" C:\Windows\SysWOW64\yljktmln\
2⤵
PID:3616

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yljktmln binPath= "C:\Windows\SysWOW64\yljktmln\rvcgilbn.exe /d\"C:\Users\Admin\AppData\Local\Temp\f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2520

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yljktmln "wifi internet conection"
2⤵
- Launches sc.exe
PID:2768

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yljktmln
2⤵
- Launches sc.exe
PID:3152

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
2⤵
- Modifies Windows Firewall
PID:1432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3068 -s 1180
2⤵
- Program crash
PID:3488

C:\Windows\SysWOW64\yljktmln\rvcgilbn.exe
C:\Windows\SysWOW64\yljktmln\rvcgilbn.exe /d"C:\Users\Admin\AppData\Local\Temp\f556b46080b93cac81ba2773afed7bc2_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4956

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4956 -s 508
2⤵
- Program crash
PID:1660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3068 -ip 3068
1⤵
PID:1536

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 4956 -ip 4956
1⤵
PID:3192

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\rvcgilbn.exe
Filesize
13.9MB

MD5
7bde59d9b1b001b33246784ad86ddf95

SHA1
b958ad1db1ca1aff28e982ed209c0693caec3215

SHA256
7b5df5adae45a7962cb759d77f3bdae35ba89c1145e3ddcd87fd097ab4984ade

SHA512
2bc63d68cbfa0a68d635d6719a526d2d242b943174106ea7d4258acd7eaa968ddd0e47296d0a31eecb7209eeb4bfa596822898ca7fc64cfb30fd304360d0af79

Download Submit
memory/388-17-0x0000000000380000-0x0000000000395000-memory.dmp

Filesize
84KB

Download
memory/388-19-0x0000000000380000-0x0000000000395000-memory.dmp

Filesize
84KB

Download
memory/388-12-0x0000000000380000-0x0000000000395000-memory.dmp

Filesize
84KB

Download
memory/388-18-0x0000000000380000-0x0000000000395000-memory.dmp

Filesize
84KB

Download
memory/388-15-0x0000000000380000-0x0000000000395000-memory.dmp

Filesize
84KB

Download
memory/3068-2-0x00000000006D0000-0x00000000006E3000-memory.dmp

Filesize
76KB

Download
memory/3068-3-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/3068-8-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/3068-9-0x00000000006D0000-0x00000000006E3000-memory.dmp

Filesize
76KB

Download
memory/3068-1-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/4956-10-0x0000000000630000-0x0000000000730000-memory.dmp

Filesize
1024KB

Download
memory/4956-16-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4956-11-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads